CASSI on watchOS
Fast access to authorizations and an emergency card.
Experimental CASSI Design. CASSI Watch explored which parts of a healthcare product deserve a place on a 40–45 mm screen. The goal was not to reproduce the mobile app. It was to preserve the two moments where speed matters most: checking a recent authorization and presenting a membership card in an emergency.[1]
Designing for a glance
Based on CASSI research and the Apple Human Interface Guidelines, the design prioritized quick checks: cards showed the procedure, value, and date, with full details available on tap. SF Compact typography, spacing, and color preserved legibility on a 40–45 mm screen.
Emergency access is a different job
The membership card followed a separate interaction model. Keeping it only inside the app would require too many steps, so the concept paired an in-app card with an Apple Wallet pass. The pass used a familiar system surface, could be reached with the side-button gesture, and could be shared through native flows.
Outcome
The result was a focused wearable concept rather than a feature checklist: two core features, short interactions, and a clear boundary between daily monitoring and emergency action. The case demonstrates how platform constraints can sharpen product strategy instead of merely shrinking an existing interface.
The project involved four people: Lio Schimanko, Illa Penha, Felipe Pires, and Luís Aragão. Lio Schimanko worked as a UX Designer. ↩︎